The European Central Bank (ECB) just put out an interesting study looking at whether Twitter and Google can be used to predict stock market moves — and its conclusion is, for Twitter, it can. The ECB says: "Twitter bullishness has a statistically and economically significant predictive value in respect of share prices in the United States, the United Kingdom and Canada." In other words, what people are saying on Twitter can tell you whether stocks are going up or down that day. The central bank used daily tweets containing the words "bullish" or "bearish" to gauge how positive investors were feeling about the market ... (full story)